1/* 2 This file is part of drd, a thread error detector. 3 4 Copyright (C) 2006-2013 Bart Van Assche <bvanassche@acm.org>. 5 6 This program is free software; you can redistribute it and/or 7 modify it under the terms of the GNU General Public License as 8 published by the Free Software Foundation; either version 2 of the 9 License, or (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307, USA. 20 21 The GNU General Public License is contained in the file COPYING. 22*/ 23 24 25#include "drd_clientobj.h" /* struct mutex_info */ 26#include "drd_error.h" 27#include "drd_malloc_wrappers.h" 28#include "drd_mutex.h" 29#include "drd_suppression.h" /* drd_start_suppression() */ 30#include "pub_drd_bitmap.h" /* LHS_W, ... */ 31#include "pub_tool_vki.h" 32#include "pub_tool_basics.h" 33#include "pub_tool_libcassert.h" /* tl_assert() */ 34#include "pub_tool_libcbase.h" /* strlen() */ 35#include "pub_tool_libcfile.h" /* VG_(get_startup_wd)() */ 36#include "pub_tool_libcprint.h" /* VG_(printf)() */ 37#include "pub_tool_machine.h" 38#include "pub_tool_mallocfree.h" /* VG_(malloc), VG_(free) */ 39#include "pub_tool_options.h" /* VG_(clo_xml) */ 40#include "pub_tool_threadstate.h" /* VG_(get_pthread_id)() */ 41#include "pub_tool_tooliface.h" /* VG_(needs_tool_errors)() */ 42 43 44/* Local function declarations. */ 45 46static const HChar* drd_get_error_name(Error* e); 47 48 49/* Local variables. */ 50 51static Bool s_show_conflicting_segments = True; 52 53 54void DRD_(set_show_conflicting_segments)(const Bool scs) 55{ 56 s_show_conflicting_segments = scs; 57} 58 59void DRD_(trace_msg)(const HChar* format, ...) 60{ 61 va_list vargs; 62 va_start(vargs, format); 63 if (VG_(clo_xml)) { 64 VG_(printf_xml)(" <trace><text>"); 65 VG_(vprintf_xml)(format, vargs); 66 VG_(printf_xml)("</text></trace>\n"); 67 } else { 68 VG_(vmessage)(Vg_UserMsg, format, vargs); 69 VG_(message)(Vg_UserMsg, "\n"); 70 } 71 va_end(vargs); 72} 73 74void DRD_(trace_msg_w_bt)(const HChar* format, ...) 75{ 76 va_list vargs; 77 va_start(vargs, format); 78 if (VG_(clo_xml)) { 79 VG_(printf_xml)(" <trace><text>"); 80 VG_(vprintf_xml)(format, vargs); 81 VG_(printf_xml)("</text>\n"); 82 } else { 83 VG_(vmessage)(Vg_UserMsg, format, vargs); 84 VG_(message)(Vg_UserMsg, "\n"); 85 } 86 VG_(get_and_pp_StackTrace)(VG_(get_running_tid)(), VG_(clo_backtrace_size)); 87 va_end(vargs); 88 if (VG_(clo_xml)) 89 VG_(printf_xml)(" </trace>\n"); 90} 91 92/** 93 * Emit error message detail in the format requested by the user. 94 */ 95static void print_err_detail(const HChar* format, ...) PRINTF_CHECK(1, 2); 96static void print_err_detail(const HChar* format, ...) 97{ 98 va_list vargs; 99 va_start(vargs, format); 100 if (VG_(clo_xml)) 101 VG_(vprintf_xml)(format, vargs); 102 else 103 VG_(vmessage)(Vg_UserMsg, format, vargs); 104 va_end(vargs); 105} 106 107/** 108 * Describe the client address a as good as possible, putting the result in ai. 109 */ 110static 111void describe_malloced_addr(Addr const a, AddrInfo* const ai) 112{ 113 Addr heap_block_start; 114 115 if (DRD_(heap_addrinfo)(a, &heap_block_start, &ai->size, &ai->lastchange)) 116 { 117 ai->akind = eMallocd; 118 ai->rwoffset = a - heap_block_start; 119 } 120 else 121 { 122 ai->akind = eUnknown; 123 } 124} 125 126/** 127 * Report where a client synchronization object has been observed for the first 128 * time. The printed call stack will either refer to a pthread_*_init() or a 129 * pthread_*lock() call. 130 */ 131static void first_observed(const Addr obj) 132{ 133 DrdClientobj* cl; 134 135 cl = DRD_(clientobj_get_any)(obj); 136 if (cl) { 137 tl_assert(cl->any.first_observed_at); 138 if (VG_(clo_xml)) { 139 print_err_detail(" <first_observed_at>\n" 140 " <what>%pS</what>\n" 141 " <address>0x%lx</address>\n", 142 DRD_(clientobj_type_name)(cl->any.type), obj); 143 VG_(pp_ExeContext)(cl->any.first_observed_at); 144 print_err_detail(" </first_observed_at>\n"); 145 } else { 146 print_err_detail("%s 0x%lx was first observed at:\n", 147 DRD_(clientobj_type_name)(cl->any.type), obj); 148 VG_(pp_ExeContext)(cl->any.first_observed_at); 149 } 150 } 151} 152 153static 154void drd_report_data_race(Error* const err, const DataRaceErrInfo* const dri) 155{ 156 const Bool xml = VG_(clo_xml); 157 const HChar* const what_prefix = xml ? " <what>" : ""; 158 const HChar* const what_suffix = xml ? "</what>" : ""; 159 const HChar* const auxwhat_prefix = xml ? " <auxwhat>" : ""; 160 const HChar* const auxwhat_suffix = xml ? "</auxwhat>" : ""; 161 const HChar* const indent = xml ? " " : ""; 162 AddrInfo ai; 163 164 XArray* /* of HChar */ descr1 165 = VG_(newXA)( VG_(malloc), "drd.error.drdr2.1", 166 VG_(free), sizeof(HChar) ); 167 XArray* /* of HChar */ descr2 168 = VG_(newXA)( VG_(malloc), "drd.error.drdr2.2", 169 VG_(free), sizeof(HChar) ); 170 171 tl_assert(dri); 172 tl_assert(dri->addr); 173 tl_assert(dri->size > 0); 174 tl_assert(descr1); 175 tl_assert(descr2); 176 177 (void) VG_(get_data_description)(descr1, descr2, dri->addr); 178 /* If there's nothing in descr1/2, free them. Why is it safe to to 179 VG_(indexXA) at zero here? Because VG_(get_data_description) 180 guarantees to zero terminate descr1/2 regardless of the outcome 181 of the call. So there's always at least one element in each XA 182 after the call. 183 */ 184 if (0 == VG_(strlen)( VG_(indexXA)( descr1, 0 ))) { 185 VG_(deleteXA)( descr1 ); 186 descr1 = NULL; 187 } 188 if (0 == VG_(strlen)( VG_(indexXA)( descr2, 0 ))) { 189 VG_(deleteXA)( descr2 ); 190 descr2 = NULL; 191 } 192 /* Assume (assert) that VG_(get_data_description) fills in descr1 193 before it fills in descr2 */ 194 if (descr1 == NULL) 195 tl_assert(descr2 == NULL); 196 /* So anyway. Do we have something useful? */ 197 if (descr1 == NULL) 198 { 199 /* No. Do Plan B. */ 200 describe_malloced_addr(dri->addr, &ai); 201 } 202 203 print_err_detail("%sConflicting %s by thread %d at 0x%08lx size %ld%s\n", 204 what_prefix, dri->access_type == eStore ? "store" : "load", 205 dri->tid, dri->addr, dri->size, what_suffix); 206 207 VG_(pp_ExeContext)(VG_(get_error_where)(err)); 208 if (descr1 != NULL) { 209 print_err_detail("%s%s\n", indent, (HChar*)VG_(indexXA)(descr1, 0)); 210 if (descr2 != NULL) 211 print_err_detail("%s%s\n", indent, (HChar*)VG_(indexXA)(descr2, 0)); 212 } else if (ai.akind == eMallocd && ai.lastchange) { 213 print_err_detail("%sAddress 0x%lx is at offset %ld from 0x%lx.%s%s", 214 auxwhat_prefix, dri->addr, ai.rwoffset, 215 dri->addr - ai.rwoffset, auxwhat_suffix, 216 xml ? "\n" : ""); 217 if (xml) 218 print_err_detail(" <allocation_context>\n"); 219 else 220 print_err_detail(" Allocation context:\n"); 221 VG_(pp_ExeContext)(ai.lastchange); 222 if (xml) 223 print_err_detail(" </allocation_context>\n"); 224 } else { 225 HChar sect_name[64]; 226 VgSectKind sect_kind; 227 228 sect_kind = VG_(DebugInfo_sect_kind)(sect_name, sizeof(sect_name), 229 dri->addr); 230 if (sect_kind != Vg_SectUnknown) { 231 print_err_detail("%sAllocation context: %ps section of %ps%s\n", 232 auxwhat_prefix, VG_(pp_SectKind)(sect_kind), 233 sect_name, auxwhat_suffix); 234 } else { 235 print_err_detail("%sAllocation context: unknown.%s\n", 236 auxwhat_prefix, auxwhat_suffix); 237 } 238 } 239 if (s_show_conflicting_segments) 240 { 241 DRD_(thread_report_conflicting_segments)(dri->tid, 242 dri->addr, dri->size, 243 dri->access_type); 244 } 245 246 if (descr2) 247 VG_(deleteXA)(descr2); 248 if (descr1) 249 VG_(deleteXA)(descr1); 250} 251 252/** 253 * Compare two error contexts. The core function VG_(maybe_record_error)() 254 * calls this function to compare error contexts such that errors that occur 255 * repeatedly are only printed once. This function is only called by the core 256 * if the error kind of e1 and e2 matches and if the ExeContext's of e1 and 257 * e2 also match. 258 */ 259static Bool drd_compare_error_contexts(VgRes res, Error* e1, Error* e2) 260{ 261 tl_assert(VG_(get_error_kind)(e1) == VG_(get_error_kind)(e2)); 262 263 switch (VG_(get_error_kind)(e1)) 264 { 265 case DataRaceErr: 266 { 267 const DataRaceErrInfo* const dri1 = VG_(get_error_extra)(e1); 268 const DataRaceErrInfo* const dri2 = VG_(get_error_extra)(e2); 269 return dri1->access_type == dri2->access_type 270 && dri1->size == dri2->size; 271 } 272 case MutexErr: 273 { 274 const MutexErrInfo* const mei1 = VG_(get_error_extra)(e1); 275 const MutexErrInfo* const mei2 = VG_(get_error_extra)(e2); 276 return mei1->mutex == mei2->mutex; 277 } 278 default: 279 return True; 280 } 281} 282 283/** 284 * Called by the core just before an error message will be printed. Used by 285 * DRD to print the thread number as a preamble. 286 */ 287static void drd_tool_error_before_pp(Error* const e) 288{ 289 static DrdThreadId s_last_tid_printed = 1; 290 DrdThreadId* err_extra; 291 292 err_extra = VG_(get_error_extra)(e); 293 294 if (err_extra && *err_extra != s_last_tid_printed && !VG_(clo_xml)) { 295 VG_(umsg)("%s:\n", DRD_(thread_get_name)(*err_extra)); 296 s_last_tid_printed = *err_extra; 297 } 298} 299 300/** Report an error to the user. */ 301static void drd_tool_error_pp(Error* const e) 302{ 303 const Bool xml = VG_(clo_xml); 304 const HChar* const what_prefix = xml ? " <what>" : ""; 305 const HChar* const what_suffix = xml ? "</what>" : ""; 306 307 if (xml) 308 VG_(printf_xml)( " <kind>%pS</kind>\n", drd_get_error_name(e)); 309 310 switch (VG_(get_error_kind)(e)) 311 { 312 case DataRaceErr: { 313 drd_report_data_race(e, VG_(get_error_extra)(e)); 314 break; 315 } 316 case MutexErr: { 317 MutexErrInfo* p = (MutexErrInfo*)(VG_(get_error_extra)(e)); 318 tl_assert(p); 319 if (p->recursion_count >= 0) { 320 print_err_detail("%s%s: mutex 0x%lx, recursion count %d, owner %d." 321 "%s\n", what_prefix, VG_(get_error_string)(e), 322 p->mutex, p->recursion_count, p->owner, what_suffix); 323 } else { 324 print_err_detail("%sThe object at address 0x%lx is not a mutex.%s\n", 325 what_prefix, p->mutex, what_suffix); 326 } 327 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 328 first_observed(p->mutex); 329 break; 330 } 331 case CondErr: { 332 CondErrInfo* cdei =(CondErrInfo*)(VG_(get_error_extra)(e)); 333 print_err_detail("%s%s: cond 0x%lx%s\n", what_prefix, 334 VG_(get_error_string)(e), cdei->cond, what_suffix); 335 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 336 first_observed(cdei->cond); 337 break; 338 } 339 case CondDestrErr: { 340 CondDestrErrInfo* cdi = (CondDestrErrInfo*)(VG_(get_error_extra)(e)); 341 print_err_detail("%s%s: cond 0x%lx, mutex 0x%lx locked by thread %d%s\n", 342 what_prefix, VG_(get_error_string)(e), cdi->cond, 343 cdi->mutex, cdi->owner, what_suffix); 344 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 345 first_observed(cdi->mutex); 346 break; 347 } 348 case CondRaceErr: { 349 CondRaceErrInfo* cei = (CondRaceErrInfo*)(VG_(get_error_extra)(e)); 350 print_err_detail("%sProbably a race condition: condition variable 0x%lx" 351 " has been signaled but the associated mutex 0x%lx is" 352 " not locked by the signalling thread.%s\n", 353 what_prefix, cei->cond, cei->mutex, what_suffix); 354 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 355 first_observed(cei->cond); 356 first_observed(cei->mutex); 357 break; 358 } 359 case CondWaitErr: { 360 CondWaitErrInfo* cwei = (CondWaitErrInfo*)(VG_(get_error_extra)(e)); 361 print_err_detail("%s%s: condition variable 0x%lx, mutexes 0x%lx and" 362 " 0x%lx%s\n", what_prefix, VG_(get_error_string)(e), 363 cwei->cond, cwei->mutex1, cwei->mutex2, what_suffix); 364 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 365 first_observed(cwei->cond); 366 first_observed(cwei->mutex1); 367 first_observed(cwei->mutex2); 368 break; 369 } 370 case SemaphoreErr: { 371 SemaphoreErrInfo* sei = (SemaphoreErrInfo*)(VG_(get_error_extra)(e)); 372 tl_assert(sei); 373 print_err_detail("%s%s: semaphore 0x%lx%s\n", what_prefix, 374 VG_(get_error_string)(e), sei->semaphore, what_suffix); 375 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 376 first_observed(sei->semaphore); 377 break; 378 } 379 case BarrierErr: { 380 BarrierErrInfo* bei = (BarrierErrInfo*)(VG_(get_error_extra)(e)); 381 tl_assert(bei); 382 print_err_detail("%s%s: barrier 0x%lx%s\n", what_prefix, 383 VG_(get_error_string)(e), bei->barrier, what_suffix); 384 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 385 if (bei->other_context) { 386 if (xml) 387 print_err_detail(" <confl_wait_call>\n"); 388 print_err_detail("%sConflicting wait call by thread %d:%s\n", 389 what_prefix, bei->other_tid, what_suffix); 390 VG_(pp_ExeContext)(bei->other_context); 391 if (xml) 392 print_err_detail(" </confl_wait_call>\n"); 393 } 394 first_observed(bei->barrier); 395 break; 396 } 397 case RwlockErr: { 398 RwlockErrInfo* p = (RwlockErrInfo*)(VG_(get_error_extra)(e)); 399 tl_assert(p); 400 print_err_detail("%s%s: rwlock 0x%lx.%s\n", what_prefix, 401 VG_(get_error_string)(e), p->rwlock, what_suffix); 402 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 403 first_observed(p->rwlock); 404 break; 405 } 406 case HoldtimeErr: { 407 HoldtimeErrInfo* p =(HoldtimeErrInfo*)(VG_(get_error_extra)(e)); 408 tl_assert(p); 409 tl_assert(p->acquired_at); 410 if (xml) 411 print_err_detail(" <acquired_at>\n"); 412 else 413 print_err_detail("Acquired at:\n"); 414 VG_(pp_ExeContext)(p->acquired_at); 415 if (xml) 416 print_err_detail(" </acquired_at>\n"); 417 print_err_detail("%sLock on %s 0x%lx was held during %d ms" 418 " (threshold: %d ms).%s\n", what_prefix, 419 VG_(get_error_string)(e), p->synchronization_object, 420 p->hold_time_ms, p->threshold_ms, what_suffix); 421 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 422 first_observed(p->synchronization_object); 423 break; 424 } 425 case GenericErr: { 426 GenericErrInfo* gei = (GenericErrInfo*)(VG_(get_error_extra)(e)); 427 print_err_detail("%s%s%s\n", what_prefix, VG_(get_error_string)(e), 428 what_suffix); 429 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 430 if (gei->addr) 431 first_observed(gei->addr); 432 break; 433 } 434 case InvalidThreadId: { 435 InvalidThreadIdInfo* iti =(InvalidThreadIdInfo*)(VG_(get_error_extra)(e)); 436 print_err_detail("%s%s 0x%llx%s\n", what_prefix, VG_(get_error_string)(e), 437 iti->ptid, what_suffix); 438 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 439 break; 440 } 441 case UnimpHgClReq: { 442 UnimpClReqInfo* uicr =(UnimpClReqInfo*)(VG_(get_error_extra)(e)); 443 print_err_detail("%sThe annotation macro %s has not yet been implemented" 444 " in %ps%s\n", what_prefix, uicr->descr, 445 "<valgrind/helgrind.h>", what_suffix); 446 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 447 break; 448 } 449 case UnimpDrdClReq: { 450 UnimpClReqInfo* uicr =(UnimpClReqInfo*)(VG_(get_error_extra)(e)); 451 print_err_detail("%sThe annotation macro %s has not yet been implemented" 452 " in %ps%s\n", what_prefix, uicr->descr, 453 "<valgrind/drd.h>", what_suffix); 454 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 455 break; 456 } 457 default: 458 print_err_detail("%s%s%s\n", what_prefix, VG_(get_error_string)(e), 459 what_suffix); 460 VG_(pp_ExeContext)(VG_(get_error_where)(e)); 461 break; 462 } 463} 464 465static UInt drd_tool_error_update_extra(Error* e) 466{ 467 switch (VG_(get_error_kind)(e)) 468 { 469 case DataRaceErr: 470 return sizeof(DataRaceErrInfo); 471 case MutexErr: 472 return sizeof(MutexErrInfo); 473 case CondErr: 474 return sizeof(CondErrInfo); 475 case CondDestrErr: 476 return sizeof(CondDestrErrInfo); 477 case CondRaceErr: 478 return sizeof(CondRaceErrInfo); 479 case CondWaitErr: 480 return sizeof(CondWaitErrInfo); 481 case SemaphoreErr: 482 return sizeof(SemaphoreErrInfo); 483 case BarrierErr: 484 return sizeof(BarrierErrInfo); 485 case RwlockErr: 486 return sizeof(RwlockErrInfo); 487 case HoldtimeErr: 488 return sizeof(HoldtimeErrInfo); 489 case GenericErr: 490 return sizeof(GenericErrInfo); 491 case InvalidThreadId: 492 return sizeof(InvalidThreadIdInfo); 493 case UnimpHgClReq: 494 return sizeof(UnimpClReqInfo); 495 case UnimpDrdClReq: 496 return sizeof(UnimpClReqInfo); 497 default: 498 tl_assert(False); 499 break; 500 } 501} 502 503/** 504 * Parse suppression name. 505 * 506 * The suppression types recognized by DRD are the same types as the error 507 * types supported by DRD. So try to match the suppression name against the 508 * names of DRD error types. 509 */ 510static Bool drd_is_recognized_suppression(const HChar* const name, 511 Supp* const supp) 512{ 513 DrdErrorKind skind = 0; 514 515 if (VG_(strcmp)(name, STR_DataRaceErr) == 0) 516 skind = DataRaceErr; 517 else if (VG_(strcmp)(name, STR_MutexErr) == 0) 518 skind = MutexErr; 519 else if (VG_(strcmp)(name, STR_CondErr) == 0) 520 skind = CondErr; 521 else if (VG_(strcmp)(name, STR_CondDestrErr) == 0) 522 skind = CondDestrErr; 523 else if (VG_(strcmp)(name, STR_CondRaceErr) == 0) 524 skind = CondRaceErr; 525 else if (VG_(strcmp)(name, STR_CondWaitErr) == 0) 526 skind = CondWaitErr; 527 else if (VG_(strcmp)(name, STR_SemaphoreErr) == 0) 528 skind = SemaphoreErr; 529 else if (VG_(strcmp)(name, STR_BarrierErr) == 0) 530 skind = BarrierErr; 531 else if (VG_(strcmp)(name, STR_RwlockErr) == 0) 532 skind = RwlockErr; 533 else if (VG_(strcmp)(name, STR_HoldtimeErr) == 0) 534 skind = HoldtimeErr; 535 else if (VG_(strcmp)(name, STR_GenericErr) == 0) 536 skind = GenericErr; 537 else if (VG_(strcmp)(name, STR_InvalidThreadId) == 0) 538 skind = InvalidThreadId; 539 else if (VG_(strcmp)(name, STR_UnimpHgClReq) == 0) 540 skind = UnimpHgClReq; 541 else if (VG_(strcmp)(name, STR_UnimpDrdClReq) == 0) 542 skind = UnimpDrdClReq; 543 else 544 return False; 545 546 VG_(set_supp_kind)(supp, skind); 547 return True; 548} 549 550/** 551 * Read additional suppression information from the suppression file. 552 * 553 * None of the suppression patterns recognized by DRD has 'extra' lines 554 * of information in the suppression file, so just return True to indicate 555 * that reading the 'extra' lines succeeded. 556 */ 557static 558Bool drd_read_extra_suppression_info(Int fd, HChar** bufpp, 559 SizeT* nBufp, Int* lineno, Supp* supp) 560{ 561 return True; 562} 563 564/** 565 * Determine whether or not the types of the given error message and the 566 * given suppression match. 567 */ 568static Bool drd_error_matches_suppression(Error* const e, Supp* const supp) 569{ 570 return VG_(get_supp_kind)(supp) == VG_(get_error_kind)(e); 571} 572 573static const HChar* drd_get_error_name(Error* e) 574{ 575 switch (VG_(get_error_kind)(e)) 576 { 577 case DataRaceErr: return VGAPPEND(STR_, DataRaceErr); 578 case MutexErr: return VGAPPEND(STR_, MutexErr); 579 case CondErr: return VGAPPEND(STR_, CondErr); 580 case CondDestrErr: return VGAPPEND(STR_, CondDestrErr); 581 case CondRaceErr: return VGAPPEND(STR_, CondRaceErr); 582 case CondWaitErr: return VGAPPEND(STR_, CondWaitErr); 583 case SemaphoreErr: return VGAPPEND(STR_, SemaphoreErr); 584 case BarrierErr: return VGAPPEND(STR_, BarrierErr); 585 case RwlockErr: return VGAPPEND(STR_, RwlockErr); 586 case HoldtimeErr: return VGAPPEND(STR_, HoldtimeErr); 587 case GenericErr: return VGAPPEND(STR_, GenericErr); 588 case InvalidThreadId: return VGAPPEND(STR_, InvalidThreadId); 589 case UnimpHgClReq: return VGAPPEND(STR_, UnimpHgClReq); 590 case UnimpDrdClReq: return VGAPPEND(STR_, UnimpDrdClReq); 591 default: 592 tl_assert(0); 593 } 594 return 0; 595} 596 597/** 598 * Return extra suppression information. 599 * 600 * Invoked while printing a suppression pattern because the user 601 * specified --gen-suppressions=yes or all on the command line. DRD does not 602 * define any 'extra' suppression information. 603 */ 604static 605Bool drd_get_extra_suppression_info(Error* e, 606 /*OUT*/HChar* buf, Int nBuf) 607{ 608 return False; 609} 610 611static 612Bool drd_print_extra_suppression_use(Supp* su, 613 /*OUT*/HChar* buf, Int nBuf) 614{ 615 return False; 616} 617 618static 619void drd_update_extra_suppresion_use(Error* e, Supp* supp) 620{ 621 return; 622} 623 624/** Tell the Valgrind core about DRD's error handlers. */ 625void DRD_(register_error_handlers)(void) 626{ 627 VG_(needs_tool_errors)(drd_compare_error_contexts, 628 drd_tool_error_before_pp, 629 drd_tool_error_pp, 630 False, 631 drd_tool_error_update_extra, 632 drd_is_recognized_suppression, 633 drd_read_extra_suppression_info, 634 drd_error_matches_suppression, 635 drd_get_error_name, 636 drd_get_extra_suppression_info, 637 drd_print_extra_suppression_use, 638 drd_update_extra_suppresion_use); 639} 640